The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 22, 1983
Filed:
Feb. 15, 1980
Applicant:
Inventors:
Assignee:
Nippon Steel Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21C / ;
U.S. Cl.
CPC ...
75 58 ; 75 53 ;
Abstract
The present invention provides an improved process for desulfurization of molten pig iron by a first step of adding powdered aluminum to the molten pig iron and a second step of adding CaO to the molten pig iron, the improvement comprising adding the aluminum as a powdery mixture with CaO, alumina or both, whereby splashing associated with the addition of aluminum alone is reduced.